Shock-absorbing mechanism



Sept 20 192.7 E. H. SCHMIDT SHOCK BSORBINGl MECHANISM Filed James; 1926 2 sheets-sheet'l lub/@low sept. zo, 1927.I

1,643,052 E. H. SCHMIDT SHOCK ABSORBING MECHANISM Filed Jan. 6. 1,926 2 Sheets-Shea?. 2

Patented Sept.l 20, 1927.

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n yelnrnszr n scHMIDT,orcnnvnmmnoniomss a ksfrnnn'cixsrnvers COMPANY, or CLEVELAND, entre, A coRPoRATroN or '0H1o. Y

iPATENT renonce 'NATINAL MALLEABLE Ann YSHOCK-AB'soRn'ING rrr,ncrrnnisia;

Application filed January FigflisA a plan, partlyfin sect-ion', of a shock absorbing mechanism embodying my invention; F ig. 2 is an end elevation thereof withgthewedge'follower removed; Fig. 3 is an end Velevation of the inner side of the follower wedge; Fig. 4 isa plan, partly in section, of'a modified form of myA invention; Fig. 5 is an end elevation thereofV with the i wedge followerremoved; Fig. :6 is an end view of a pressure transmitting member;

Figf7- is a sidev elevation thereofg'Fig. 8 isV anendgelevation of the shoe; and Figq9 isa sidev'elevation of theshoe.,`

My invention relates to shock absorbing mechanism, andparticularly to friction draft gears for railway vehicles of the type de-A scribed inLe'tters Patent 1,192,571of Ernest Schmidt, granted Julyy 26, 1916,V and 1,301,809 ofrChester K. Brooks and Ernest Schmidt, kgranted AApril 29, 1919.` VMy in-` vention comprises anv effective releasing meansV for the gear inwhich the springv ele- `ment 'acts both for developing friction and y for releasing the' parts. vMy invention also comprises `Various features `which I shall hereinafter ldescribe and claim.'v

Referring to the drawings, the central friction member 2 has Ilongit'udinally-eX- tending outwardly radiating. arms 3 and ter-r -minates at its rear end in an enlarged base 4. "Friction shoes 5 seat between the friction faces of j the outwardly vradiating armsj ,.2 Each friction shoe-has a wedging surfacej.

engaged jby the wvedge surface f7 oni the v 3 wedge: followelS.v The rear faceof the shoe has abearing 9 for the outer coil of the spring element, and also an offsetbearing 11 Y. for the inner-coil 12 ofthe spring element. The coils v10'and 12 'of the spring element bear at their rear ends against the base 4 of ,the central friction member 2.-V The outer coil 10 of ther spring element at its forward end in addition to'bearing against the'sur-' face` 9 on the shoe also bears against the surface 13 of thewedge followerLS. m

In the operation of my improved gear, as

- the' compression abates'the heavy coilv 10, by

, reason voff its bearing upon the surface 13 of the wedge 8, will cause the wedge to' release from Aits adhesion to the shoe 5, thus permitting the' force of the inner coil 12 to force the shoe 5 outwardly along the .fricd tion faces of the central member, and at the same the bearing of the heavy e, '1926. serial 79,603.

the shoeoutwardly.` i,

Thebearing' 13 on Vthe outer coil 10 is shown in advance ofl its bearing 9o`n the 10 upon the shoe will also assist iii-driving shoe, so as to compensate for the movement o f the shoe? inwardly" of the wedge occasioned by wear on the frictional surfaces of the Ashoe or upon the surfaces 6 and 7.

' 'It will thus be seen that during compres-v Y `sion the movement of the shoe is resisted by both of the coils 1() andV 12 of the springelement, and' that in release the heavy coil- 10 will 'be suicient tobreak theadhesion of the wedge and thus'permit the coils 10 and'12 to drive theishoe outwardly to releasedposition.V This'resultsVin-an extremely satis'- factory release 'and as wellpreserves sub-Y stantially the full capacity of tthe springs l for generating friction between the jshoes and the centralV frictionV member,

sired, ther` mechanism which I have just de-i scribed may be applied to only one sidefof the gear, for which purposes Vit will be effective forI gears of certain capacities. f A

' In Figs. 4, 5,6,"7, 8 and 9 I have shown a modified form of my invention in which'a pressure"transmittingfmember 15 isl interposed between the outer coil- 10 of the spring element and the: wedge '8 and shoe l5', respectively. shoe 5 has a dowelor rearward extension 16 which forms a bearing for the innercoilt Inl this 2 construction the or coils 12 ofthe springelement. Thejop-V eration rof this *modified form` is substan` i,

tially like that of the preferred form, the pressure transmitting element 15 serving vto transmit pressure to Vand from the Vvout-er'coilV 10 respectivelyto the, shoe 5, and wedge 8". The terms and expressions which Iv have employed; are usedr as terms'of description and not' offlimitation, and I have 'no intention,r 1n the useof such termsand expres-- sions, of .excluding any mechanical equiva-r lents of thev features shown and described', or portions thereof,'but recognizeY that varrous-"structural modificati-ons 'are Vpossible within thescope ofthe inventionl claimed. 'i

, What Icla'im is:

1. In friCtinalV shock absorbingmecha'- nism", a longitudinally-extendingv included friction member having a plurality of longitudinally entendi'ng friction faces;` a fricf aon sie@ engaging' ea h pf Such;

inclined wedgifie wedge member engaging the wedging face of each shoe; a compression spring element arranged to resif-t the inward movement of a shoe and the Wedge relative to the central friction member, said spring element also being arranged for severally releasingl the Wedge and the said friction shoe.

2. In frictional shock absorbing mechanisnn a longitudinally-extending included friction member having a plurality of lougitudinally extending fii'iction faces; a friction shoe engaging each of such faces; each shoe having an inclined ivedging face; a wedge member engaging the Wedging face of each shoe; a compression spring element arranged in tandem vvith each shoe and having bearings on said shoe and member, said spring` element being adapted vwhen the pressure abates to move the ivedge and shoe into released position.

In frictional shock absorbing mechanism, a longitudinally-extending included friction member having a plurality of longitudinally-extending friction faces: friction shoes engaging each of such faces; each shoe having an inclined Wedging face; a ivedging member engaging a ivedging face of each shoe; a` compression spring arranged in tandem ivith each shoe; said spring upon one side being adapted to exert direct pressure against the Wedge and on the other siffle against the friction shoe.

ll. V[n frietional shock absorbing mechanisnn a longitndinally-extending included friction member having a plurality of longitudinally-extending friction faces: a friction shoe engaging each of such faces` each shoe having an inclined ivedging face: a Wedge member engaging a ivedging face of each shoe; a conipression spring arranged in tandem with each shoe and having a bearing against said wedge said spring being adapted to develop friction between slice and included member and to severally cause release of weldgekand shoe as the pressure abates.

5. ,ln frictional shock absorbing mechanism, a longitudinally-exteinling included friction member ha ving a plurality of longitudinally extending friction faces; a friction shoe engaging each of such faces; each shoe having an inclined ivedging face: a wedge member engaging the Wedging face of each shoe, a compression spring element arranged in tandem with both a shoe and the Wedge and disposed so as to resist the inward movement ot the said shoe and the Wedge relative to the central friction member, said spring element being arranged to transmit pressure simultaneously both to said friction shoe and said Wedge. l

6. In frictional shock absorbingT mechanism, a longitudinally-extending included friction member having.;l a plurality of longitudinally extendingl friction faces; a friction .shoe engaging each of such faces; each shoe having an inclined n'cdging it'aci; a Wedge member engaging the wcdgingface of each shoe; a compre. ion spring element comprising a phufality of nested coils arranged to resist the inward movement of a shoe and a Wedge relative to the included friction member`r at least one of the coils being arranged for severally releasingthe wedge and the said 'friction shoe.

T. `ln frictional shock absorbing mechanism, a longitudinally-extending included friction member havim.;l a phn'ality of longitudinally extending friction faces; a friction shoe engaging each of such faces; each shoe having an inclined Wedging face; a Wedge member engaging the edging face of each shoe; a compression spring element ar anged to resist the inward movement of a shoe and the Wedge relative to the central friction member. said spring element having independent bearings for the Wedge and for the shoe and said indepeiideiit bearings forming means with the said element for severally releasing the wedge and shoe.

8. ln frict'ional shock absorbingl mechanism, a longitudinally-extending included friction member having a plurality of longitudinally extending friet'ioi'i faces: a friction shoe engaging each of such faces: each shoe. having an inclined wedging face; a wedge member ei'igaging the wedging face of each shoe: a com pression spring element arranged to resist the inn'ard nlovenlent; of a shoe and the wedge relative to the central friction member, said spring element having on one side a bearing for the wedge and on the other i bearing for the shoe and being arranged for severally releasing the Wedge and shoe, the bearing` of the spring element upon the shoe being otlset' relative to its bearing on the Wedge to compensate for Wear on the shoe relative to the included friction lnember and the wedge. i y

f). ln trictional shock absorbing mechanisnn a .longitndinaily-extending incltu'led friction member having a plurality of longitudinally-extending friction faces; a friction shoe engaging each of such faces: one of said shoes having an inclined Wedging face; a wedge member engaging the said ivedging face: a compression springl element arranged to resist the inward n'ioven'icnt of said shoe and the Wedge relative to the central friction memben said spring clement also being` arranged for severally releasing the Wedge and the said friction shoe. t

ERNEST H. SCHMIDT. 

